public static PipelineDefinition<TInput, TOutput> Bucket<TInput, TIntermediate, TValue, TOutput>(
	this PipelineDefinition<TInput, TIntermediate> pipeline,
	Expression<Func<TIntermediate, TValue>> groupBy,
	IEnumerable<TValue> boundaries,
	Expression<Func<IGrouping<TValue, TIntermediate>, TOutput>> output,
	AggregateBucketOptions<TValue> options = null,
	ExpressionTranslationOptions translationOptions = null
)

<ExtensionAttribute>
Public Shared Function Bucket(Of TInput, TIntermediate, TValue, TOutput) ( 
	pipeline As PipelineDefinition(Of TInput, TIntermediate),
	groupBy As Expression(Of Func(Of TIntermediate, TValue)),
	boundaries As IEnumerable(Of TValue),
	output As Expression(Of Func(Of IGrouping(Of TValue, TIntermediate), TOutput)),
	Optional options As AggregateBucketOptions(Of TValue) = Nothing,
	Optional translationOptions As ExpressionTranslationOptions = Nothing
) As PipelineDefinition(Of TInput, TOutput)

[<ExtensionAttribute>]
static member Bucket : 
        pipeline : PipelineDefinition<'TInput, 'TIntermediate> * 
        groupBy : Expression<Func<'TIntermediate, 'TValue>> * 
        boundaries : IEnumerable<'TValue> * 
        output : Expression<Func<IGrouping<'TValue, 'TIntermediate>, 'TOutput>> * 
        ?options : AggregateBucketOptions<'TValue> * 
        ?translationOptions : ExpressionTranslationOptions 
(* Defaults:
        let _options = defaultArg options null
        let _translationOptions = defaultArg translationOptions null
*)
-> PipelineDefinition<'TInput, 'TOutput>